[squid-users] Low performance even with low number of users

Hi,

I have a "curious" case of low performance with Squid.

The symptom is that every request take at least +/- 7 seconds. Even
when there is a small number of clients.

The browser keeps waiting and when it load, it loads fast.

If I allow the client to access the web without proxy, it access
really fast. So, there's no bandwidth problems - and in fact it loads
fast after the "freeze" period. (with the same DNS, by the way).

I've tried many things. Currently, I'm using no cache on disk
(cache_dir null /tmp).So it's not related with Disk IO bottleneck.

The service time information:

Median Service Times (seconds) 5 min 60 min:
 HTTP Requests (All): 0.49576 0.32154
 Cache Misses: 0.49576 0.32154
 Cache Hits: 0.00000 0.00091
 Near Hits: 0.22004 0.15888
 Not-Modified Replies: 0.00000 0.00494
 DNS Lookups: 0.25460 0.23291
 ICP Queries: 0.00000 0.00000

But still the client can't access it fast. And what is curious: even
if I access it on a time when there's no employee, the access is still
slow.

I've tried also many "debug_options #,9", but some of the info I was
unable to interpret.

The hardware is enough for the demand - but maybe the settings are wrong.
Version 2.6.STABLE21 (CentOS)

Any hints?

Thanks.
Luiz.
Received on Thu Oct 10 2013 - 15:00:24 MDT